Tests and Double-Entry Bookkeeping

I came across this
interview with legendary Code HygienistBob Martin, and
want to bookmark it here before I lose it.

Among the highlights was an insight that test-driven development can gain suite-cred when sold by analogy with double-entry bookkeeping. I was reminded of the early PLoP conferences where a entrepreneur and rouge scholar Dan Palanza promoted the idea of double-entry bookkeeping as pattern that he was convinced has applicability beyond the domain of accountancy. It was gratifying to see Bob showcase this useful connection between it and TDD.

The discussion of codebase health metrics was useful too.
Here's some information on the Braithwaite metric mentioned in the interview.